Unit sales of print books dipped 0.3% in the week ended May 18, 2014, compared to week 20, at outlets that report to Nielsen BookScan. The decline was due entirely to a weak performance in the adult fiction segment, where unit sales fell 19%, compared to the week ended May 19, 2013. There were no major new adult fiction releases in the week, with the mass market paperback edition of Inferno the top seller in the category, selling just over 37,000 copies at outlets that report to BookScan. There were no big debuts on the juvenile fiction segment either, but sales of the two paperback editions of The Fault in Our Stars had strong double-digit gains over week 19 of 2014, and combined to sell about 127,000 copies in week 20. The juvenile nonfiction list had a solid 12% unit increase in the week, compared to week 20 of 2013, as two Minecraft titles remained on top. The National Geographic Kids Almanac debuted at #3, selling approximately 6,550 copies at BookScan outlets.